Mechanical Properties of Polymer and the Stress-Strain Curve -Tensile Testing

This video will help you to measure and define strength, toughness, hardness, brittleness, stiffness, and flexibility of polymeric material from stress-strain curve. Also how these terms are different from each other.

[Negasi_Kokob]

I watch it today. Easy and clear explanation of the confusing terms. Thank you!

[jenxx]

Thank you so much for this clear and interesting explanation of the mechanical properties of polymers! It's very useful for my education about polymers and I will definitely watch more of your videos.

[philipmcbride]

Thank you for creating this video. I am an engineer in support of a mechanical test lab. We test both metals and polymers. When we test metal per ASTM E8, we run the test with strain control through yield; but when we test polymers per ASTM D638 we use a fixed speed and simply measure the strain. We perform the polymer test on the same materials, using different sized dog bones. We test the Type IV at 1 in/min and the type V at 0.5 in/min. Doing so provides statistically different results. My theory is that this is because the two different dog bone sizes are being strained at different rates, and testing with strain control, rather than fixed speed might bring these results closer together, however the guidance documents require the test to be performed at a fixed speed. Does anyone know why poly tensile testing is done at fixed speed rather than by strain control?

[cybersuite]

This is an excellent, clear and very approachable lecture, thank you very much!

[mansi]

I can't find the second part Sir, kindly share the link.

[prakhartiwari]

I didn't find next video, so fom where i can get next video link sir ....

[paulofabret]

Excellent ! thank you but I believe that you avoid confusion when you wrote brittleness ( elongation at break) . looks like you are saying the brittleness = elongation at break, and you shouldn't explain by reverse mode. This is just my opinion. I spent some time with this approach

[supriyashetty]

polymer electrolyte....which property plays a vital role

[keshavtiwari]

Please upload more vedios on this topic
Like:-
Selection of polymer, recyclong of polymer ,

[ie_Moh]

Hello, excellent!
I have a question:
How to increase hardness in thermoplastic??

[rakeshsankineni]

is this the same curve we can obtain after compression test also for polymers

[sanstutisri..]

I want videos on biomedical polymers like contact lens, dental, artificial heart, kidney, skin and blood cells polymer

[tithinutpohboon]

Thank you for explanation.
I have some questions. Can we determine yield strength of polymer by using 0.2% offset method (like metal) ?

[mshoiab]

sample X has more tensile strength then sample Y what can you say about its growth rate Why?

[ankitmehta]

Sirji pp article ( injection moulding crates) ko soft banana ho toh kon sa polymer mix karna hota hai..jaise hd mein ld ta lldp dalte hai

[aakashparmar]

sir, can you explained the brittleness for polymer. as in metal brittle are that which has very less yeilding. and please explain how C graph has more brittleness.

[omersaeed]

Excellent explanation.. Please upload 2nd part

[dipankardas]

Dear Sir/Ma'm your videos are very informative. I am preparing for GATE exam can you also bring videos for material science. It will be very helpful

[_nish.art_]

Thanks a lot ❤️
Finally understood the logic

[swatigupta]

brittleness means measure of elongation at break ... so if elongation is more it is less brittle or more brittle. Because in example, 'c' has has more brittleness but has more elongation before break?? please clarify.